CVE-2021-4191

mediumpriority · attend · 59EPSS 0.800 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · functional

Likely / severe?

80.0% (100th) EPSS

CVSS 5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-23

An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · cve@gitlab.comexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-203USLLM-inferred

exploits (2)

Public proof-of-concept and weaponised exploit code.

auxiliary/scanner/http/gitlab_graphql_user_enumGitLab GraphQL API User Enumerationfunctional · metasploit
Adelittle/CVE-2021-4191_ExploitsAdelittle/CVE-2021-4191_ExploitsPoC · poc_in_github

affected products (9)

Products and version ranges known to be affected.

GitLab GitLab13.0, → 14.6.5enisa_euvdEU
GitLab GitLab14.7, → 14.7.4enisa_euvdEU
GitLab GitLab14.8, → 14.8.2enisa_euvdEU
gitlab gitlab13.0.0 → 14.6.5nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab14.7.0 → 14.7.4nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
gitlab gitlab14.8 → 14.8.2nvdUScpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Bitnami gitlab13.0.0 → 14.6.5osvUSpkg:bitnami/gitlab
Bitnami gitlab14.7.0 → 14.7.4osvUSpkg:bitnami/gitlab
Bitnami gitlab14.8.0 → 14.8.2osvUSpkg:bitnami/gitlab

advisories (1)

Vendor and ecosystem advisories describing this.

BIT-gitlab-2021-41912024-03-06vendor · osvUS
An issue has been discovered in GitLab CE/EE affecting versions 13.0 to 14.6.5, 14.7 to 14.7.4, and 14.8 to 14.8.2. Private GitLab instances with restricted sign-ups may be vulnerable to user enumeration to unauthenticated users through the GraphQL API.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2022-03-28modified 2026-06-17

references (13)

External citations — patches, advisories, analysis.

scry

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